Enable bitcoin_hashes v0.14.0

Hardware devices like the smallest binary possible, currently if one
builds with latest `rust-bitcoin` and `rust-bip39` they get two versions
of `bitcoin_hashes` in the dependency graph because we don't support the
latest `bitcoin_hashes`.

We use a range dependency for `bitcoin_hashes`. We can support the
latest version with no code changes. However using the latest version
causes the MSRV to increase.

Add the latest version of `bitcoin_hashes` to the range dependency.

Cargo.toml

@@ -49,13 +49,13 @@ serde = { version = "1.0", default-features = false, features = [ "alloc" ], opt
 zeroize = { version = "1.5", features = ["zeroize_derive"], optional = true }
 
 # Unexported dependnecies
-bitcoin_hashes = { version = ">=0.12, <=0.13", default-features = false }
+bitcoin_hashes = { version = ">=0.12, <=0.14", default-features = false }
 unicode-normalization = { version = "=0.1.22", default-features = false, optional = true }
 
 [dev-dependencies]
 # Enabling the "rand" feature by default to run the benches
 bip39 = { path = ".", features = ["rand"] }
-bitcoin_hashes = ">=0.12,<0.14" # enable default features for test
+bitcoin_hashes = ">=0.12,<=0.14" # enable default features for test
 
 
 [package.metadata.docs.rs]

README.md

@@ -31,6 +31,8 @@ Use the `all-languages` feature to enable all languages.
 
 This crate supports Rust v1.41.1 and up and works with `no_std`.
 
+Using `bitcoin_hashes v0.14.0` raises the MSRV to `1.56.1`.
+
 When using older version of Rust, you might have to pin the version of the
 `bitcoin_hashes` crate used as such:
 ```